[alsa-devel] Output levels on SBLive! 5.1 on ALSA vs WIndows
chernyue at gdc-tech.com
Mon Jun 18 11:37:46 CEST 2007
I am using an SBLive! 5.1 sound card (emu10k1 chipset) with 6 channel output.
Due to the nature of my work, I need to be able to play sound through all 6
channels at the same output level to an amplifier.
Using Linux and the emu10k1 ALSA driver, I measured output voltage levels on
an oscilloscope while playing a sine wave on all 6 channels, and I got three
different output voltage amplitudes for the front, rear and center/subwoofer
Repeating the same test with the same card on WIndows using the Creative
SBLive drivers from their website, I am able to get the same output voltage
amplitude on all 6 channels.
For both tests, all output levels in the relevant mixers were set to their
I would like to know if this output normalizing 'feature' of the SBLive
Windows driver can be found in the emu10k1 ALSA driver, or in any other ALSA
driver. Failing that, is there any other solution to set output levels in the
driver, or am I doomed to twiddle in alsamixer to get the output levels that
Thanks in advance.
More information about the Alsa-devel